275 (#361) ############################################ PL101 SETS OF MACHINES Thus an 8-spindle box would be employed but for the fact that there are other factors influencing the result still to be considered. ar ta ܘܬܗܘܢ ܀ ber nice ork cumplir umber be De The next factor will be best understood by elimin- ating drafts and doublings—by supposing that they are equal and thus neutralize one another—and considering the effect of length delivery (relative sliver speed) by preceding and succeeding boxes. Thus again three conditions may be supposed, viz. : I. Sliver speed of box 1 being greater than sliver speed from box 2; 2. Sliver speed of box 1 being equal to sliver speed from box 2; 3. Sliver speed of box 1 being less than sliver speed from box 2. In the first case the heads or spindles in the suc- ceeding box must be increased in proportion as box 1 dominates box 2. In the second case the heads or spindles in the preceding and succeeding boxes will be equal. In the third case the heads or spindles in the succeeding box would be less in proportion as box 1 is dominated by box 2. his domination we have already used to make up for the lack of a spindle in the example given on p. 274. Tentative Rule.-In any drawing-boxes in sequence the succeeding heads or spindles will balance the preceding heads or spindles if varied- As sliver speed of succeeding box : sliver speed of preceding box. Example : Required spindles in the 4th box to follow one spindle in the 3rd box, the relative sliver speeds of boxes 3 and 4 being as 1 : 2 respectively. As 2 :I:: 1 : x = spindle in succeeding box to keep up with preceding box. och CP t E DE . JUS BE 275